Degassing device and inkjet recording apparatus

Abstract

A degassing device removes air dissolved in a liquid under a pressure decreased atmosphere, and includes one or more liquid tanks, a pressure decreasing device, and an inflow pass. One or more liquid tanks store the liquid. The pressure decreasing device decreases pressure in the liquid tank. The inflow pass allows the liquid to be flowed into the liquid tank due to a negative pressure in the pressure decreased liquid tank.

1 . A degassing device which removes air dissolved in a liquid under a pressure decreased atmosphere, the degassing device comprising:
 one or more liquid tanks in which the liquid is stored;   a pressure decreasing device which decreases pressure in the liquid tank; and   an inflow pass which allows the liquid to be flowed into the liquid tank due to a negative pressure in the pressure decreased liquid tank.   
     
     
         2 . The degassing device according to  claim 1 , comprising:
 a plurality of the liquid tanks, wherein   the pressure decreasing device communicates with at least one of the liquid tanks, and   the inflow pass allows the liquid to be flowed from the liquid tank which is not decreased in pressure into the other liquid tank which is decreased in pressure by the pressure decreasing device.   
     
     
         3 . The degassing device according to  claim 1 , comprising:
 a plurality of the liquid tanks, wherein   the inflow pass allows any two or more of the liquid tanks to be communicated with each other.   
     
     
         4 . The degassing device according to  claim 1 , comprising:
 a plurality of the liquid tanks;   a plurality of the inflow passes, the inflow pass allowing any two or more of the liquid tanks to be communicated with each other; and   a control device which controls the pressure decreasing device and the inflow passes, wherein   the control device controls the pressure decreasing device such that a pressure of any one of the liquid tanks is decreased and controls the inflow passes such that the liquid is flowed from the liquid tank which is not decreased in pressure into the other liquid tank which is decreased in pressure by the pressure decreasing device.   
     
     
         5 . The degassing device according to  claim 4 , comprising:
 three or more of the liquid tanks; wherein   the control device controls the pressure decreasing device such that a pressure of any one of the liquid tanks is decreased and controls the inflow passes such that the liquid is flowed from the liquid tank which is not decreased in pressure into the other liquid tank which is decreased in pressure by the pressure decreasing device.   
     
     
         6 . The degassing device according to  claim 5 , wherein
 the control device controls the pressure decreasing device to flow the liquid into the liquid tank which is decreased in pressure and then to maintain a pressure decreased state of the liquid tank which is decreased in pressure.   
     
     
         7 . The degassing device according to  claim 5 , wherein
 the control device controls such that approximately all amount of the liquid stored in the liquid tank which is not decreased in pressure is flowed into the other liquid tank which is decreased in pressure by controlling the pressure decreasing device.   
     
     
         8 . The degassing device according to  claim 1 , wherein
 the inflow pass includes a plurality of inflow ports through which the liquid is flowed into the liquid tank.   
     
     
         9 . The degassing device according to  claim 8 , wherein
 the inflow ports allow the liquid to be flowed in in a form of shower.   
     
     
         10 . The degassing device according to  claim 9 , wherein
 an opening diameter of the inflow port is 0.8 mm or less.   
     
     
         11 . The degassing device according to  claim 8 , wherein
 a number of the inflow ports is 25 or more.   
     
     
         12 . An inkjet recording apparatus comprising:
 the degassing device according to  claim 1 ; and   a recording head which ejects the liquid degassed by the degassing device to a sheet.